/Engine/Source/Runtime/MeshConversion/Public/MeshDescriptionToDynamicMesh.h
Convert()must have been used to create the TargetMesh before calling this function
void CopyTangents ( const [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) * SourceMesh, const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) * TargetMesh, [UE::Geometry::TMeshTangents](API\Runtime\GeometryCore\DynamicMesh\TMeshTangents)< double > * TangentsOut )